/**
 * gwt-validator 
 *
 * Copyright (C) 2006  Nikolaus Rumm, Christian Simonutti
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
package gwt.validator.client.check;

import java.util.List;

/**
 * <code>Check</code>s represent validation rules.
 * 
 * The implementation should be fine grained, meaning that a check should only
 * test a single requirement. Actions can be composed using
 * <code>ValidationScope</code>s.
 * 
 * @author <a href="mailto:nikolaus.rumm@gmail.com">Nikolaus Rumm</a>
 */
public interface Check {

	/**
	 * Performs the validation.
	 * 
	 * @return The list of validation issues. An empty list means that there
	 *         were no issues.
	 */
	public List validate();
}
